JP2002206690A - Fluid transfer heat insulated pipe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a low-cost fluid transfer heat insulated pipe capable of eliminating the fear of breaking a signal line, and easily treating the terminal of the signal line, and having good durability. SOLUTION: This heat insulated pipe 1 for transferring hot water is formed by an outer pipe 2, two inner pipes 3 and a plurality of signal lines 4. The outer pipe 2 is formed by a pair of inner and outer heat insulating coated pipes 11, 12, and two inner pipes 3 are accommodated in the internal space E of the outer pipe 2. A line storing space S is provided between two-layer coated pipes 11, 12, and the signal lines 4 are disposed in the space. The inner pipes 3 disposed in the internal space E of the outer pipe 2 and the signal lines 4 are isolated from each other by the coated pipe 11 positioned inside the signal lines 4. By this isolation, various disadvantages caused by contact between the signal lines 4 and the inner pipes 3 can be overcome.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling / heating water pipe of a cooling / heating apparatus provided for improving the livability in a detached house, an apartment house, a commercial building, or the like, or a cooling / heating apparatus provided in the house or the like. The present invention relates to a pipe under a floor of a device or a heat transfer pipe for fluid transfer used for water supply / hot water supply from an outdoor heat source device to an indoor terminal device.

[0002]

2. Description of the Related Art In a cooling and heating apparatus, a heat medium (mainly water) is cooled or heated by electricity or gas by a heat source device installed outdoors, and the heat medium is cooled by a synthetic resin pipe to a floor installed indoors. A heating mat, a wall-mounted type or a ceiling-mounted terminal device for cooling and heating are introduced, and the indoor device is cooled and heated by heat exchange with the device.

[0003] The pipes used for fluid transfer in such a cooling and heating device or the like must have a heat insulating property for suppressing heat radiation from a heat medium between the heat source device and the terminal equipment, and have a temperature around the terminal equipment. In order to remotely control a heat source unit having a function of stabilizing the tapping temperature using a proportional control valve or the like based on information (such as tapping temperature), it is necessary to provide a signal line such as an insulated wire in the pipe. It is.

[0004] Under these circumstances, Japanese Utility Model Laid-Open No. 62-1060.
As exemplified in JP-A-86-86, the outer periphery of a plastic fluid transfer inner pipe is covered with a foamed plastic heat insulating layer (heat insulating layer), and this layer is further covered with a plastic protective layer (outer pipe). And a heat transfer pipe for fluid transfer in which a signal line is embedded in the heat insulating layer. In Japanese Utility Model Application Laid-Open No. 5-61919 and Japanese Patent Application Laid-Open No. 7-78517, it is unknown whether or not it has a heat insulating property, but a technique of burying a signal line in an insulating material having a fluid transfer passage, or A technique is described in which a signal line is buried together with a fluid transfer tube in an insulating material.

In order to connect a signal line provided in the fluid transfer heat insulating pipe to a terminal device or a heat source device, it is necessary to perform a terminal process of drawing out the terminal portion to the outside. In this case, in the configuration in which the signal line is buried as in each of the conventional examples, the signal line is pulled out from the end by a predetermined length, and the portion is dug out using a cutter or the like. Therefore, it is necessary to remove the material burying it according to the length of the drawer. Therefore, the terminal treatment work is troublesome, and the workability of the heat transfer pipe for fluid transfer is deteriorated.

[0006] The heat transfer pipe for heat transfer includes an inner pipe on the outgoing side for guiding the heat medium from the heat source device to the terminal equipment, and a conversely, an inner pipe on the return side for guiding the heat medium from the terminal equipment to the heat source equipment. There is also provided a housing in which both of these inner tubes are housed in an inner space of a heat insulating outer tube and a plurality of signal lines are housed in the inner space. In the same manner, the outgoing side and the return side
A thin film coating layer is wound around the two inner tubes to restrain the two inner tubes from each other, and an inner V-shaped groove between the two inner tubes is closed by the thin film coating layer. There is also known a fluid transfer heat insulating pipe in which a plurality of signal lines are accommodated in an internal space of a heat insulating outer pipe (see JP-A-11-82875).

However, in these conventional examples, the two inner tubes and the plurality of signal lines are located in the same internal space of the outer tube, and the inner tube and the signal lines are provided in contact with each other. Therefore, there are the following problems.

In other words, the two inner tubes expand and contract due to a rise and fall in the temperature of the fluid passing through the inside, a change in the internal pressure, and the like. Since the degree of expansion and contraction differs between the inner tube on the going side and the inner tube on the return side, a signal line may be sandwiched between the two inner tubes and an excessive load may be applied to the signal line. Therefore, the signal line may be disconnected based on such a load.

Moreover, in the former heat-insulated tube having no thin film protective layer, there is a high possibility that the two inner tubes and the plurality of signal lines move separately in the outer tube. However, during the time from the manufacture of the heat insulating pipe to the construction thereof, the heat insulating pipe may be entangled with each other or twisted and wound. for that reason,
If the inner tube expands and contracts abnormally after the construction, the signal line may be involved and may receive a large tensile force and break.

[0010] In addition, the terminal of the signal line may be drawn into the heat insulating pipe due to the entanglement or twisting. In this case, when performing the terminal processing of the signal line for the heat source device and the terminal device, the position of the signal line is not known, and thus there is a possibility that the work may be hindered.

Further, the signal line is generally coated with an insulating material such as soft polyvinyl chloride. However, since the signal line is in contact with the inner tube, heat insulation is required for the insulating coating of the signal line. , You have to use expensive signal lines. In addition, as the plasticizer and the like contained in the insulating coating migrate to the inner tube made of a synthetic resin due to the contact, the deterioration of the inner tube and the signal line is promoted. There is a risk of impairing the performance.

[0012]

The problem to be solved by the present invention is to solve the problem of disconnection of a signal line, and to easily process the signal line at a low cost with excellent durability. An object of the present invention is to provide a heat transfer pipe for fluid transfer.

[0013]

In order to solve the above-mentioned problems, the invention according to claim 1 comprises a multi-layer outer tube having at least two layers of heat-insulating cladding tubes and coaxially combining them. A fluid transfer inner pipe made of a synthetic resin accommodated in the inner space of the outer pipe, and a signal line disposed between the cladding pipes adjacent to each other, the inner pipe being inside the signal line of the outer pipe. The signal line and the inner tube are separated by a cladding tube located.

In carrying out the invention of claim 1,
As in the second aspect of the present invention, a line accommodating space extending continuously in the axial direction is provided between the cladding tubes adjacent to each other, and the signal line can pass through this space. Further, in implementing the invention of claim 2, as in the invention of claim 3, the outer peripheral surface of the inner cladding tube and the inner peripheral surface of the outer cladding tube among the adjacent cladding tubes are different from each other. The line accommodating space may be formed between the non-peripheral surfaces except for the non-peripheral surface facing the line accommodating space. Further, in the invention according to any one of claims 1 to 3, claim 4
As described in the invention, the two inner tubes are housed in the outer tube, and the cladding tube facing the inner space and located inside the signal line protrudes into the inner space facing the signal line. It is preferable to have a ridge extending in the axial direction, and to accommodate the two inner pipes separately on both sides of the ridge. Further, in carrying out the invention of claim 2, as in the invention of claim 5, the outer pipe has an inner cladding pipe and an annular cross section so that both side edges do not contact each other on the outer peripheral surface of the inner pipe. It comprises a tubular spacer wound and an outer cladding tube provided to cover the spacer, and forming the wire accommodating space between both side edges of the tubular spacer and the pair of inner and outer cladding tubes. it can.

In the first aspect of the present invention, it is preferable that the inner tube has flexibility in terms of facilitating handling during construction and the like, and the inner tube may be used in any number. When a plurality of inner pipes are used, a thin film coating layer is wrapped around the inner pipes to restrain each pipe so as not to be separated from each other, to facilitate handling, and to twist the inner pipes. Or entanglement may be suppressed.

In the first aspect of the present invention, the synthetic resin material for forming the inner tube may be a cross-linked polyethylene, polybutene, polypropylene, polyamide, polyethylene, or the like. Among these, the material cost is low,
It is preferable to use a crosslinked polyethylene having resistance to warm water and excellent durability.

In the first aspect of the present invention, the outer tube may be formed with at least two layers of cladding tubes.
It is preferable that these heat-insulating cladding tubes also have flexibility in that they can be easily handled during construction. Further, claim 1
In the invention of the invention, as a material for forming the outer tube, a material having a heat insulating effect, for example, a cross-linked polyethylene foam, a polyethylene foam, a polypropylene foam, polyurethane, or the like can be used. It is preferable to use a crosslinked polyethylene foam which is more excellent in heat resistance than a foam. In addition, it does not prevent the heat ray reflective layer such as aluminum foil from being stuck to the inner peripheral surface of the innermost layer of the outer tube, and the innermost layer of the outer tube is easily cut by hand. In order to achieve this, it is also possible to adopt a configuration in which a cut is made in the circumferential direction or the like, or an intermittently continuous air vent pinhole is formed. Further, for the innermost coating tube, a heat insulating material having a large surface sliding resistance, such as foamed elastomer, can be used in order to prevent the inner tube accommodated therein from sliding down. Further, when the cladding tube forming the outer tube has three or more layers, the cladding tube at the intermediate position may have a configuration having, for example, a corrugated surface in order to increase the air layer as a heat insulating space. Also, it does not prevent the heat ray reflective layer such as aluminum foil from being attached to at least one of the inner peripheral surface and the outer peripheral surface of the intermediate layer.

According to the first aspect of the present invention, the signal line may be an insulated wire, a cable, a cord, or the like, and the signal conductor of the signal line may be copper, copper alloy, aluminum, optical fiber, Can be formed by
In the case where the signal conductor is an electric wire, a stranded wire is preferable to a single wire because breakage due to construction is small. Further, it is preferable to use crosslinked polyethylene, soft PVC (polyvinyl chloride), or the like for the amount of insulating material and the coating material forming the outer layer of the signal line. Further, it is preferable that the signal line has a small diameter with respect to the inner space of the outer tube so that a degree of freedom can be maintained.
It is preferable that the insulating tube has such flexibility that the outer tube is not damaged when the insulating tube is installed. In addition, the signal lines may be arranged anywhere between adjacent cladding tubes of the outer tube, and each signal line may be divided and arranged at a plurality of locations between adjacent cladding tubes. However, when a plurality of signal lines are used for the same purpose, it is preferable to dispose them at one location between adjacent cladding tubes in terms of manufacturing and handling. In addition, the signal line is directly under the outermost cladding tube of the cladding tubes that form the outer tube,
In other words, it is good to arrange it facing the inner peripheral surface of this cladding tube,
Such piping is preferable in that the terminal treatment of the signal line is facilitated and the possibility of damaging the inner tube at that time is further reduced. In addition, the signal line and the cladding tube in contact with the signal line may or may not be adhered. In the case where the signal line is adhered, the position of the signal line can be held only by bonding a part thereof. .

In the first aspect of the present invention, the outer tube 2
The signal line is arranged between the heat insulating cladding tubes of the layers or more, and the inner tube and the signal line arranged in the inner space of the outer tube are separated by the cladding tube located inside the signal line. Various problems caused by contact between the inner tube and the inner tube can be solved. In other words, the signal line does not wrap around the inner tube, so that the signal line does not overload as the inner tube expands and contracts, and the terminal position of the signal line is fixed without being retracted. Can be held. Further, the influence of the temperature of the inner tube on the signal line can be buffered by the coating tube located inside the signal line, and the plasticizer contained in the insulating coating of the signal line does not migrate to the inner tube.

[0020]

(Embodiment 1) Hereinafter, a first embodiment of the present invention will be described with reference to FIG. In this embodiment,
This shows an application example as a heat insulating pipe for transferring hot and cold water for supplying hot and cold water to a cooling and heating facility installed in a building such as an apartment house. The heat insulating tube 1 includes an outer tube 2, two inner tubes 3, and a plurality of signal lines 4.

The outer tube 2 includes an inner cladding tube 11 and an outer cladding tube 1.
2 are formed coaxially, and the internal space E extends over the entire length in the axial direction. Both cladding tubes 11,
Numeral 12 is made of a heat insulating material having flexibility, for example, a cross-linked polyethylene foam, and the innermost cladding tube 11 has heat resistance to withstand hot water supply temperature and the like. The two cladding tubes 11 and 12 are not limited to being made of the same kind of material, and may be made of a different material. In this case, the outer cladding tube 12 does not particularly need to have heat resistance against hot water supply temperature or the like.

The outer tube 2 is formed by laminating two plate-like materials having a predetermined width and extending continuously in the axial direction, while rolling the plate-like materials so that both side edges thereof are aligned with each other. The two side edges that are combined are bonded by heat fusion or the like. In FIG. 1B, reference numerals 11a and 12a indicate bonding portions. In the outer tube 2 manufactured as described above, the outer peripheral surface of the inner cladding tube 11 and the inner peripheral surface of the outer cladding tube 12 are bonded or fused except for a part. FIG.
(B) Middle symbols 11b and 12b are both inner and outer cladding tubes 11 and 12.
, Which form a single line accommodation space S. This line accommodation space S is, for example, approximately 180 ° in the circumferential direction with respect to the bonding portions 11a and 11b.
It is provided at a remote position and extends in the axial direction of the heat insulating tube 1 over the entire length of the heat insulating tube 1.

The inner cladding tube 11 facing the internal space E has a ridge 12c projecting into the internal space E in a part thereof. The ridge 12c also extends in the axial direction of the heat insulating tube 1 over the entire length of the heat insulating tube 1. The ridge 12c is the inner cladding tube 1.
It is provided at a position corresponding to the first non-landing surface 11b.
In the outer tube 2 made as described above, the inner cladding tube 11
After bonding the plate material and the plate material of the outer cladding tube 12 in a flat state except for the non-peripheral surfaces 11b and 12b, the inner and outer peripheral lengths are rounded and joined. The protrusions 12c can be formed with the surplus due to the difference between the two. By providing the ridges 12c, the shortest distance between the tip of the ridges 12c and the inner peripheral surface portion separated by about 180 ° in the circumferential direction from the ridges 12c is reduced when the two inner tubes 3 are arranged. It is smaller than the maximum dimension in the direction.

The two inner tubes 3 are made of synthetic resin, for example, heat-resistant and flexible cross-linked polyethylene. These inner tubes 3 are accommodated in the internal space E. More specifically, in FIG. 1B, one inner tube 3 is accommodated on the left side of the ridge 12c, and the other inner tube 3 is accommodated on the right side of the ridge 12c. A pair of inner tubes 3
When the outer tube 2 is made, it is inserted and piped so as to be wrapped by the outer tube. One inner pipe 3 is used as an outgoing pipe for guiding hot water as a heat medium from a hot-water supply device (heat source device) (not shown) to a hot-water supply device (terminal device), and the other inner pipe 3 is provided from the hot-water supply device. It is used as a return pipe for returning hot water whose temperature has dropped to the water heater.

For each of the signal lines 4, an insulated wire having flexibility enough not to damage the outer tube 2 at the time of laying the heat insulating tube 1 in a building is used. These signal lines 4
Is used for remote control of the hot-water supply equipment, and extends in the axial direction of the heat-insulating pipe 1 over the entire length of the heat-insulating pipe 1 and is accommodated with play in the wire accommodation space S. Since the line accommodation space S is provided immediately below the outermost coating layer 12, each signal line 4 is wired immediately below the outermost coating layer 12.

In this embodiment, each signal line 4 is connected to the outer tube 2.
Therefore, as shown in FIG. 1 (C), the wire is housed so as to meander in the wire housing space S to generate an extra length. Such accommodation can be realized by feeding the signal line 4 faster than the manufacturing speed of the outer tube 2 (the feeding speed of the inner and outer cladding tubes 11 and 12) into an insulated tube forming device (not shown).

In the present embodiment, the non-peripheral surfaces 11b and 12b forming the line accommodating space S and the signal lines 4 are in contact with but not adhered to each other. It is possible to move freely. However, it is not prevented that one or several places are adhered to the central part in the longitudinal direction of the signal line 4 in order to prevent the signal line 4 from coming off.

On the surface of the outermost layer of the heat insulating tube 1, a skin film 1 is provided.
3 are applied. This film 13 has been subjected to uneven processing (not shown) over the entire surface to prevent slippage. Further, a mark 14 indicating the accommodation position of the signal line 4 is provided on the surface of the outer film 13 so as to correspond to the line accommodation space S as shown in FIG. The mark 14 is provided, for example, by printing a display line extending in the axial direction. In addition, if necessary, the surface of the skin film 13
Indicia indicating the use of the heat insulating tube 1 can be provided, and both ends of the heat insulating tube 1 in the longitudinal direction are provided with an outermost coating tube 12 in advance in order to easily draw out the terminal portion of the signal line 4.
A cut corresponding to the signal line 4 can be made at the end of the.

Although the pair of inner tubes 3 housed side by side in the inner space E of the heat insulating tube 1 having the above-described configuration are not restricted to each other, the movement of the inner tubes 3 in the inner space E is caused by the ridges 12c.
Is provided, the inner pipes 3 can be prevented from being twisted and entangled with each other when manufacturing, constructing, and after constructing the heat insulating pipe 1. Since the signal line 4 is separated from the pair of inner tubes 3 by the inner cladding tube 11, the signal line 4 is connected to the inner tube 3 at the time of manufacturing, at the time of construction, and after the construction.
It is not wrapped around and entangled. Therefore, the positional relationship between the inner and outer pipes 2 and 3 and the signal line 4 does not fall apart at the end of the heat insulating pipe 1, and in particular, the signal line 4 is not drawn into the axial center portion of the heat insulating pipe 1. . Therefore, there is no hindrance to the construction work of the heat insulating pipe 1, such as the work for drawing out the terminal portion of the signal line 4, and the construction work can be facilitated.

Since the inner tube 3 and the signal line 4 are held in a non-contact manner by the cladding tube 12 inside the signal line 4 as described above, the signal line 4 does not wrap around the inner tube 3. , Inner pipe 3
Inner pipe 3 according to the rise and fall of
Is abnormally expanded or contracted in the axial direction, the signal line 4
Are not pulled by being pulled in the axial direction. In addition, in the present embodiment, although the two inner tubes 3 are arranged, the signal line 4 is not interposed between the two tubes 3, so that even if both tubes 3 expand in the radial direction. In addition, the signal line 4 is not subjected to an abnormally strong load by these two inner tubes 3.
Therefore, there is no possibility that the signal line 4 is disconnected, and the heat insulating pipe 1
Can be greatly improved in durability.

Further, the signal line 4 is connected to the inner tube 3 by the above-described isolation.
Therefore, the plasticizer and the like contained in the insulating coating material of the signal line 4 do not migrate to the inner tube 3 made of synthetic resin. Therefore, deterioration of the inner pipe 3 and the signal line 4 can be suppressed, and in this regard, the durability of the heat insulating pipe 1 can be improved.
In addition, direct heating of the signal line 4 at the temperature of the inner tube 3 by the isolation can be suppressed by the inner cladding tube 11, so that a material having low heat resistance can be used for the insulating coating of the signal line 4. Therefore, the cost of the signal line 4 can be reduced, and the cost of the heat insulating tube 1 can be reduced accordingly.

Further, in order to draw out the terminal portion of the signal line 4 from the terminal portion of the heat insulating tube 1, the terminal portion of the outer cladding tube 12 may be removed with a cutter or the like using the mark 14 of the outer film 13 as a guide. . In this case, since the mark 14 is provided, the work is easy, and the terminal portion of the outer cladding tube 12 can be cut without damaging the signal line 4 by slightly cutting the mark 14 to cut. Moreover, in the present embodiment, the cladding tube 1 to be removed is used.
Since only 2 is the outermost layer, the terminal processing work is easy in this respect as well. Furthermore, since the inner cladding tube 11 is located below the outer cladding tube 12 to isolate the inner tube 3, it is possible to prevent the inner tube 3 from being damaged by the cutter in the terminal treatment. Further, workability of terminal processing can be improved.

In addition, in the present embodiment, the signal line 4 is accommodated in a meandering state with an extra length in the line accommodation space S, and the extra length can be extracted as needed. Therefore, the electrical connection work to the heat source device and the terminal device becomes easy, and the workability can be improved.

(Embodiment 2) FIG. 2 shows a second embodiment of the present invention. This embodiment has basically the same configuration as that of the first embodiment. Therefore, the same components as those of the first embodiment are denoted by the same reference numerals, and the description of the configuration and operation is omitted. Will be described. The heat insulating pipe 1 according to the second embodiment differs from the first embodiment in that
Two layers of cladding tube 1 forming the outer tube at the point where the inner tubes are bound to each other
1 and 12 in that the hardness is changed, and that a heat ray reflective layer is provided on the inner peripheral surface of the inner cladding tube.

More specifically, the two inner tubes 3 are bound to each other by a thin film coating layer 21 wound therearound. At the time of manufacturing the heat-insulated pipe 1, the two inner pipes 3 previously constrained as described above are fed into the heat-insulated pipe 1. Further, the cladding tube 11 that accommodates the two constrained inner tubes 3 and is inner than the signal line 4 is formed of a heat insulating material that is harder than the cladding tube 12 that is outside the signal line 4. This inner cladding tube 1
Preferably, 1 has flexibility. Further, since the inner cladding tube 11 is hardened as described above, a portion corresponding to the ridge 12c is not clearly formed in the second embodiment. An aluminum foil 22 is adhered to the inner peripheral surface of the innermost cladding tube 11 as a heat ray reflective layer. The configuration other than the points described above is the same as the heat insulating pipe 1 of the first embodiment, including the configuration not shown in FIG.

Also in this embodiment, since the plurality of signal lines 4 and the two inner tubes 3 in the internal space S are isolated by the inner cladding tube 11 of the outer tube 2, the same operation as in the first embodiment. Thus, the object of the present invention can be solved.

In addition, since the two inner tubes 3 are constrained by the thin film coating layer 21, the two inner tubes 3 are not twisted or entangled with each other at the time of manufacturing, constructing, and after constructing the heat insulating tube 1. I can do it. Therefore, it is excellent in that the positions of the ends of the two inner tubes 3 are suppressed from being varied, and the workability of the heat insulating tube 1 can be improved. In addition, since the inner cladding tube 11 is harder than the outer cladding tube 12, when performing the terminal treatment of pulling out the terminal portion of the signal line 4 from the outer tube 2, the hard inner cladding tube prevents the blade edge of the cutter from reaching the inner tube 3. 11 is excellent in that it can be easily blocked and can prevent the inner tube 4 from being damaged. Further, since the inner peripheral surface of the inner cladding tube 11 is covered with the aluminum foil 22, it is possible to reflect the radiant heat from the inner tube 3 and it is preferable in suppressing a decrease in the temperature of hot water (heat medium). However, even if the inner tube 3 is cut by any chance in the terminal processing of the signal line 4, the further cut is suppressed by the aluminum foil 22 so that the inner tube 3 can be prevented from being damaged. I have.

(Embodiment 3) FIG. 3 shows a third embodiment of the present invention. This embodiment has basically the same configuration as that of the first embodiment.
The same reference numerals are given to the embodiment, the description of the configuration and operation is omitted, and different portions will be described below. The heat insulating pipe 31 according to the third embodiment is different from the first embodiment in that the heat insulating pipe 31 includes a hot water supply pipe 32 and a hot water return pipe 33, which are arranged in parallel and adhered to each other.

More specifically, the outgoing pipe 32 accommodates one of the inner pipes 3a for going in a coaxial manner in the internal space E of the outer pipe 2 composed of the cladding pipes 11 and 12. In this pipe 32, the outer peripheral surface of the inner cladding tube 11 and the inner peripheral surface of the outer cladding tube 12 are not adhered over the entire circumference.
The gap between the wires 12 is used as a line accommodation space S, in which a plurality of signal lines 4 are accommodated. Also, the return pipe 33 is
The return inner tube 3b is accommodated coaxially in the internal space F of the single-layer cladding tube. The cladding tube 34 is the outer cladding tube 12.
It is formed in a thick single layer of a heat insulating material having the same flexibility as that described above, and an outer skin film 35 is attached to the outer peripheral surface thereof. The two pipes 32 and 33 are juxtaposed with their outer films 13 and 35 in contact with each other, and are connected by bonding or fusing the contact portions. In this configuration, the diameters of the two pipes 32 and 33 may be changed to facilitate identification, and if the pipes have the same diameter, the colors of the outer films 13 and 35 may be changed or a mark may be used to mark the two. The pipes 32 and 33 may be easily identified. The configuration other than the points described above is the same as the heat insulating pipe of the first embodiment, including the configuration not shown in FIG.

In this embodiment, too, the hot water supply pipe 32
In the above, the plurality of signal lines 4 and the inner tube 3 in the internal space S are isolated by the inner cladding tube 11 of the outer tube 2, so that the same effect as in the first embodiment can be obtained to solve the problem of the present invention. .
In this embodiment, the pipe in which the signal line 4 exists may be either going or returning.

(Embodiment 4) FIG. 4 shows a fourth embodiment of the present invention. This embodiment has basically the same configuration as the third embodiment, and therefore, the same components as the third embodiment will be described.
The same reference numerals are given to the embodiment, the description of the configuration and operation is omitted, and different portions will be described below. The difference between the heat insulating pipe 41 according to the fourth embodiment and the third embodiment is the configuration of an outgoing pipe 42 for hot water supply.

More specifically, the outer pipe 2 of the outgoing pipe 42 has a pair of inner and outer cladding pipes 11 and 12 and a cylindrical spacer 43 interposed between them. The tubular spacer 43 is preferably made of a flexible heat insulating material. The spacer 43 is wound around the outer peripheral surface of the inner cladding tube 11 so as to form an annular cross section so that both side edges 43a do not contact each other. The outer cladding tube 12 is fitted on the outer peripheral surface of the cylindrical spacer 43. A line housing space S is formed extending in the axial direction between the cladding tubes 11 and 12 and both side edges 43a of the cylindrical spacer 43 facing each other. 4 are housed together. Also, the return pipe 33 is compared with the outgoing pipe 42.
Has a small diameter, and these two pipes 42 and 33 are bonded or fused to each other to form a heat insulating pipe 41. The configuration other than the points described above is the same as the heat insulating pipe of the third embodiment, including the configuration not shown in FIG.

Also in this embodiment, the hot water supply pipe 42
, The plurality of signal lines 4 and the inner pipe 3a in the internal space E
Are isolated by the inner cladding tube 11 of the outer tube 2, so that the first
In addition, the same effects as those of the third embodiment can be obtained to solve the problem of the present invention. Moreover, in the fourth embodiment, since the cylindrical spacer 43 is used as the intermediate layer in the outer tube 2, the heat insulation performance can be further improved.

In order to further enhance the heat insulating property, a heat insulating material having a corrugated surface may be used for the intermediate layer. Furthermore, both outer surfaces of the inner cladding tube 11 and the outer cladding tube 1 and the outer cladding tube 1
2. Attaching an aluminum foil to the inner peripheral surface of 2 to further enhance the heat insulation performance by heat reflection there, and to prevent the cutter from inadvertently reaching the inner tube 3 in the terminal processing of the signal line 4. Can also.

(Embodiment 5) FIG. 5 shows a fifth embodiment of the present invention. This embodiment has basically the same configuration as that of the first embodiment. Therefore, the same components as those of the first embodiment are denoted by the same reference numerals, and the description of the configuration and operation is omitted. Will be described. The heat insulation pipe 51 according to the fifth embodiment is different from the first embodiment in that:
The point is that the heat retention of the two inner tubes is improved.

More specifically, heat insulating tubes 15 having heat insulation are fitted to the outer sides of the two inner tubes 3, and both the inner tubes 3 are accommodated in the inner space E of the outer tube 2 together with the heat insulating tubes 15. . The configuration other than the points described above is the same as the heat insulating pipe 1 of the first embodiment, including the configuration not shown in FIG.

Also in this embodiment, since the plurality of signal lines 4 and the two inner tubes 3 in the internal space S are isolated by the inner cladding tube 11 of the outer tube 2, the same operation as in the first embodiment. Thus, the object of the present invention can be solved. Moreover, the heat insulation tube 15
Is excellent in that the heat retention of the two inner tubes 3 can be improved.

(Embodiment 6) FIG. 6 shows a sixth embodiment of the present invention. This embodiment has basically the same configuration as that of the fourth embodiment. Therefore, the same components as those of the fourth embodiment are denoted by the same reference numerals, and the description of the configuration and operation is omitted. Will be described. The difference between the heat insulating pipe 61 according to the sixth embodiment and the first embodiment is that
The point is that the heat retention of the two inner tubes is improved.

More specifically, in the configuration of the heat insulating pipe described in the fourth embodiment, the skin films of the outgoing pipe 42 and the return pipe 33 are respectively omitted, and instead, these two pipes 42 and 33 are bundled. Are housed in a common heat insulating tube 62. The common heat insulating tube 62 may be formed of a heat insulating material having flexibility, for example, the same material as the inner and outer cladding tubes 11 and 12, and an outer film 63 is applied to the outer peripheral surface thereof. This film 63 does not prevent flexible deformation of the heat insulating tube 61. Further, the two pipes 42 and 33 may or may not be bonded or fused. The configuration other than the points described above is the same as the heat insulating pipe of the first embodiment, including the configuration not shown in FIG.

Also in this embodiment, a plurality of signal lines 4 and the inner tube 3 in the internal space S are connected to the inner cladding tube 11 of the outer tube 2.
Therefore, the same effect as in the first embodiment can be obtained to solve the problem of the present invention. Moreover, the use of the common heat retaining tube 62 is excellent in that the heat retaining property of the two inner tubes 3 can be improved. It should be noted that in the sixth embodiment, the common heat insulating pipe 6
The heat insulating pipe main part (consisting of the going pipe 42 and the returning pipe 43) housed in the inside 2 may be the heat insulating pipe 31 shown in FIG.

(Embodiment 7) FIG. 7 shows a seventh embodiment of the present invention. This embodiment has basically the same configuration as that of the first embodiment. Therefore, the same components as those of the first embodiment are denoted by the same reference numerals, and the description of the configuration and operation is omitted. Will be described. The difference between the heat insulating pipe 1 according to the seventh embodiment and the first embodiment is the configuration of the outer pipe.

More specifically, the outer tube 2 has a substantially circular cross section, not an elliptical shape as in the first embodiment, and an outer peripheral surface of the inner cladding tube 11 is formed of aluminum for reflecting heat rays. A pneumatic foil 71 is attached. The configuration other than the points described above is the same as the heat insulating pipe of the first embodiment, including the configuration not shown in FIG.

Also in this embodiment, since the plurality of signal lines 4 and the two inner tubes 3 in the internal space S are isolated by the inner cladding tube 11 of the outer tube 2, the same operation as in the first embodiment. Thus, the object of the present invention can be solved. In addition, the use of the aluminum foil 71 allows the heat ray reflection effect to reduce
The aluminum foil 71 is excellent in that the heat insulation of the inner tube 3 can be improved, and the aluminum foil 71 is excellent in that the cutter can be prevented from inadvertently reaching the inner tube 3 in the terminal processing of the signal line 4. .

The present invention is not limited to the above embodiments. For example, a cladding tube inside the signal line is provided inside the cladding tube outside in a state of being compressed in the circumferential direction,
The cladding tube outside the signal line may be configured to extend in the circumferential direction. In the case of employing this configuration, in the terminal processing of the signal line, the diameter of the inner cladding tube is naturally enlarged as the notch is cut into the terminal portion of the cladding tube outside the signal line, and the outer cladding tube is enlarged. Can be easily opened, so that the terminal processing work can be made easier.

[0055]

The present invention is embodied in the form described above, and has the following effects.

According to the first to fifth aspects of the present invention, the signal line is not wound around the inner tube and does not receive a load as the inner tube extends, so that the possibility of the signal line being disconnected can be eliminated. Furthermore,
Since the terminal position of the signal line is kept constant by the absence of the winding, the terminal process of drawing the terminal portion of the signal line to the outside of the outer tube is easy. Moreover, since the signal line can be buffered from being affected by the temperature of the inner tube by the cladding tube located inside the signal line, an inexpensive signal line with low heat resistance can be used for the signal line, thereby reducing costs. It is. In addition, since the plasticizer contained in the insulation coating of the signal line does not migrate to the inner tube, it is possible to provide a heat transfer tube for fluid transfer having excellent durability.

[Brief description of the drawings]

FIG. 1A is a perspective view showing a heat insulating pipe for transferring cold and hot water according to a first embodiment of the present invention. (B) is sectional drawing which shows the heat insulation pipe of FIG. 1 (A). FIG. 2C is a plan view of the heat insulating tube of FIG.

FIG. 2 is a sectional view showing a heat insulating tube for transferring cold and hot water according to a second embodiment of the present invention.

FIG. 3 is a sectional view showing a heat insulating pipe for transferring cold and hot water according to a third embodiment of the present invention.

FIG. 4 is a sectional view showing a heat insulating pipe for transferring cold and hot water according to a fourth embodiment of the present invention.

FIG. 5 is a sectional view showing a heat insulating pipe for transferring cold and hot water according to a fifth embodiment of the present invention.

FIG. 6 is a sectional view showing a heat insulating tube for transferring cold and hot water according to a sixth embodiment of the present invention.

FIG. 7 is a sectional view showing a heat insulating tube for transferring cold and hot water according to a seventh embodiment of the present invention.

[Explanation of symbols]

 Reference numerals 1, 31, 41, 51, 61: heat insulating tube 2: outer tube 3: inner tube 4: signal line 11: inner cladding tube 12: outer cladding tube 11b, 12b: non-surrounding surface of cladding tube 12c: ridge E: Internal space S: Wire storage space 42: Outgoing pipe (insulated pipe) 43: Cylindrical spacer 43a: Side edge of cylindrical spacer

 ──────────────────────────────────────────────────続 き Continuation of front page (72) Inventor Nobuyuki Nagashima 2-6-1 Marunouchi, Chiyoda-ku, Tokyo Furukawa Electric Co., Ltd. F-term (reference) 3H036 AA01 AB11 AC06 AE10 3H111 AA02 BA15 CA17 CA52 CA53 CB02 CB04 CB05 CB15 DA02 DA15 DA26 DB03

Claims (5)

[Claims] 1. A multi-layer outer tube having at least two layers of heat-insulating cladding tubes and coaxially assembling them, and a synthetic resin fluid transfer inner tube housed in the inner space of the outer tube. When,
A signal line disposed between the cladding tubes adjacent to each other, wherein the signal line and the inner tube are separated by a cladding tube located inside the signal line among the outer tubes. Insulated pipe for fluid transfer. 2. The heat insulation for fluid transfer according to claim 1, wherein a line accommodating space extending continuously in the axial direction is provided between the cladding tubes adjacent to each other, and the signal line is passed through this space. tube. 3. An outer peripheral surface of an inner cladding tube and an inner peripheral surface of an outer cladding tube among the cladding tubes adjacent to each other,
3. The heat transfer pipe according to claim 2, wherein the line accommodating space is formed between the non-peripheral surfaces except for the non-peripheral surface facing the line accommodating space. . 4. The outer tube contains two inner tubes,
A cladding tube located on the inner side of the signal line facing the internal space has a ridge extending in the axial direction while protruding into the inner space facing the signal line, and on both sides of the ridge. 2. The method according to claim 1, wherein the two inner tubes are separately accommodated.
4. The heat-insulating pipe for fluid transfer according to any one of Items 1 to 3. 5. The outer pipe is provided so as to cover an inner cladding pipe, a tubular spacer wound in an annular cross section so that both side edges do not contact each other on the outer peripheral surface of the inner pipe, and the spacer. The heat insulating tube for fluid transfer according to claim 2, further comprising: an outer cladding tube provided, wherein the wire housing space is formed between both side edges of the tubular spacer and the pair of inner and outer cladding tubes.